Rear bumper



FIG. 1 is a front and right side perspective view of a rear bumper showing my new design;

FIG. 2 is a rear and left side perspective view thereof;

FIG. 3 is a front view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a right side view thereof.

FIG. 7 is a top view thereof; and,

FIG. 8 is another front and right side perspective view of the rear bumper shown in FIGS. 1-8, with the rear bumper mounted on a vehicle shown in de-emphasized and half-tone portions so as to illustrate environmental structure. These portions form no part of the claimed invention. More particularly, in FIG. 8, the inventive rear bumper is shown within the broken line, and the elements shown outside of the broken line form no part of the claimed invention, but are instead included to show environmental aspects thereof. 

CLAIM The ornamental design for a rear bumper, as shown and described. 